Special and General Relativity Forum

Post thread
Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Graduate GR to Naive Physics: Is it Possible?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Twin Paradox & Bondi K-Calculus: Who's Younger?
  • · Replies 5 ·
Replies
5
Views
1K
High School Why do clocks experience time dilation in special and general relativity?
  • · Replies 31 ·
2
Replies
31
Views
5K
Undergrad Measuring Light Speed Anisotropy
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Does a metric exist for this surface?
  • · Replies 14 ·
Replies
14
Views
2K
High School A is slower than B, B is slower than A. Where did it go?
  • · Replies 7 ·
Replies
7
Views
2K
High School Is Special Relativity Universally Accepted?
  • · Replies 46 ·
2
Replies
46
Views
5K
Undergrad Why isn't the Roemer type experiment a one way measure of c?
  • · Replies 56 ·
2
Replies
56
Views
5K
Undergrad Gravitational Waves vs Universe Expansion Rate
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Confusion about Frame Dragging
  • · Replies 34 ·
2
Replies
34
Views
4K
Undergrad Einstein's Elevator & Tidal Gravity
  • · Replies 5 ·
Replies
5
Views
2K
Insights The Schwarzschild Metric: Part 3, A Newtonian Comparison - Comments
  • · Replies 2 ·
Replies
2
Views
2K
Insights The Schwarzschild Metric: Part 2, The Photon Sphere - Comments
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Einstein's Pursuit of Unified Theory: Motivation and Observations
  • · Replies 5 ·
Replies
5
Views
2K
High School Is the Double-Slit Experiment Validating Special Relativity's Influence on Time?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Alice Observes Bob at Event Horizon: DarkLink's Question
  • · Replies 13 ·
Replies
13
Views
2K
High School Light Propagation: Doubts Answered Here
  • · Replies 48 ·
2
Replies
48
Views
6K
Undergrad Explaining Relativity within 3 minutes
  • · Replies 14 ·
Replies
14
Views
2K
High School Young Student Wins $250K Explaining Relativity
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why Does ds^2 Equal 0 in Metrics?
  • · Replies 10 ·
Replies
10
Views
2K
High School Is the association of QG with BH a fake
  • · Replies 15 ·
Replies
15
Views
2K
High School Understanding the Flow of Time: Relativity and Perception Explained
  • · Replies 8 ·
Replies
8
Views
2K
High School Order of events and cause and effect
  • · Replies 26 ·
Replies
26
Views
4K
Graduate Kerr-Bolt Spacetime: Derivation & Resources
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Divergence of (covaraint) energymomentum tensor
  • · Replies 43 ·
2
Replies
43
Views
4K
Insights The Schwarzschild Metric: Part 1, GPS Satellites - Comments
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Does the "space twin" benefit from length contraction?
  • · Replies 136 ·
5
Replies
136
Views
12K
Undergrad Embedding Curved Spacetime in Noncurved Spacetime
  • · Replies 1 ·
Replies
1
Views
1K
High School How To Consistently Explain Electromagnetism With Relativity
  • · Replies 161 ·
6
Replies
161
Views
14K
High School Can We Really Stop Gravity by Altering Spacetime?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What is the true nature of distance in the context of space and time?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Why is all the mass of a BH in the singularity?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Velocity Relativity: Solving a Complex Problem
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Measuring Speed in Relativity - Einstein's Work Explained
  • · Replies 17 ·
Replies
17
Views
1K
Undergrad Atomic Oscillations & Redshift in Sun and Earth
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad General Relativity & Quantum Theory: Where's the Limit?
  • · Replies 3 ·
Replies
3
Views
2K
High School Why is the general theory of relativity is so complicated
  • · Replies 32 ·
2
Replies
32
Views
5K
High School Black Holes as Gateways to Parallel Universes?
  • · Replies 1 ·
Replies
1
Views
1K
High School Michelson-Morley Exp: Laws of Reflection Explained
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Requesting clarification about metric tensor
  • · Replies 33 ·
2
Replies
33
Views
4K
Undergrad Proof that Galilean & Lorentz Ts form a group
  • · Replies 18 ·
Replies
18
Views
4K
Undergrad Coordinate singularity at Schwarzschild radius
  • · Replies 57 ·
2
Replies
57
Views
8K
Undergrad Can Black Holes Create a Path for Lovers to Meet?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Lorentz-Einstein law of motion for a point particle
  • · Replies 1 ·
Replies
1
Views
1K
High School Metric Tensor and The Minkowski metric
  • · Replies 2 ·
Replies
2
Views
3K
High School Time Dilation & Length Contraction: Does Relativity Work for Mediums?
  • · Replies 9 ·
Replies
9
Views
1K
Undergrad Testing GR to What Energy Level?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Weak Gravitational Field: Solving Einstein Field Eqs
  • · Replies 3 ·
Replies
3
Views
1K
High School What is the physics of motion through space?
  • · Replies 35 ·
2
Replies
35
Views
4K
Graduate Exploring the Stress-Energy Tensor of a Perfect Fluid
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can General Relativity Accommodate Spaces Without Killing Vectors?
  • · Replies 6 ·
Replies
6
Views
1K
High School Time dilation and 2 identical clocks
  • · Replies 90 ·
4
Replies
90
Views
6K
High School Pressure Vessel Length Contraction and Pressure Comparison in a Spaceship
  • · Replies 26 ·
Replies
26
Views
2K
Graduate Geodesic Distance & Maximally Symmetric Spacetimes: Why Does it Matter?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Special Relativity: Kinetic Energy Expansion and Contradictions
  • · Replies 14 ·
Replies
14
Views
1K
Undergrad Velocity addition and conservation of the energy
  • · Replies 21 ·
Replies
21
Views
2K
High School What is a Clock? Syncing Technologies Explained
  • · Replies 105 ·
4
Replies
105
Views
11K
Undergrad Speed of Light & Magnetic Field: Condensing Wave Speed?
  • · Replies 2 ·
Replies
2
Views
1K
High School Why Isn't Work Equal to Einstein's E=mc²?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Why the speed of light is constant for every observer?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Getting Invariant Curvature from Momentum & Energy
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Line Element in Minkowski Space: Geometric Meaning
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Correct coordinate transformation from Poincare-AdS##_3## to global AdS##_3##
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Survival Time in Black Hole: Myth Debunked
  • · Replies 9 ·
Replies
9
Views
2K
High School Why do photons allow Doppler shift
  • · Replies 57 ·
2
Replies
57
Views
7K
Graduate Time dilation and simultaneity: easier to see with a train
  • · Replies 15 ·
Replies
15
Views
7K
High School Why Do We Need Gravitons for Understanding Gravity?
  • · Replies 8 ·
Replies
8
Views
2K
High School Life on a planet near a black hole
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Geodesic Equation: Understanding Proper Time & x^α
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Evaluating metric tensor in a primed coordinate system
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Velocity difference not preserved in special relativity
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Gravitational Waves Affecting EM Fields: Evidence & Implications
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Time & Space Expansion: High Schooler Qs
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Leonhard Euler's 4-Squares Identity & Maxwell's Equations
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Einstein's views on gravity and inertia
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Can light near a black hole travel in -t in external coords?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Maximizing survival time when falling into a black hole
  • · Replies 58 ·
2
Replies
58
Views
7K
Undergrad Some suspected Black hole mergers
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Tetrad formalism outside of the equatorial plane
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Definition of Vector Field in General Relativity
  • · Replies 5 ·
Replies
5
Views
2K
High School Relativistic Spring-Mass Oscillator: A Paradox?
  • · Replies 9 ·
Replies
9
Views
2K
High School Answer Questions on Relativity & Speed of Light | Beginner Physics
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad What happens to the stuff that enters a black hole?
  • · Replies 13 ·
Replies
13
Views
2K
High School Does Einstein's Field Equations Explain Space Density in Different Regions?
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Light-clock and time dilation [was: Hydrogen atom expressed mathematically]
  • · Replies 47 ·
2
Replies
47
Views
4K
Undergrad Energy Change: PE to KE in Different Frames
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Is Length Contraction Accounted for in the Analysis of a Moving Clock?
  • · Replies 15 ·
Replies
15
Views
2K
High School Gravity Illusion: Questions on Space-Time Curvature Granularity
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Non-zero components of Riemann curvature tensor with Schwarzschild metric
  • · Replies 14 ·
Replies
14
Views
7K
High School Special Relativity & Relativistic Mass
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad Atomic Clock Running Rate: Adjustment Possibilities?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Verifying claims about backwards time travel
  • · Replies 19 ·
Replies
19
Views
2K
High School Time Dilation Effects: Hafele & Keating Experiment Revisited
  • · Replies 12 ·
Replies
12
Views
2K
High School People-Safe Event Horizon: Can Alice & Bob Experiment?
  • · Replies 16 ·
Replies
16
Views
2K
Graduate Faraday Tensor Conflicts: MTW vs. Wikipedia
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Is my thought right or wrong? Light and a moving observer
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad An exception to the principle of equivalence?
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad Metric & One Forms: A R2 Confusion
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Transformer Output in Non-inertial Frame: Frequency Change?
  • · Replies 6 ·
Replies
6
Views
2K
High School What Are the Benefits of LIGO & VIRGO's Gravitational Wave Detection?
  • · Replies 7 ·
Replies
7
Views
1K